MESON Chess Problem Database

Problem Display
PID: 73403 (2q5/8/3N2P1/3R1P2/3NP1K1/4kP2/4P2R/1n2B3 w - - 0 1)

Roche, Jean

Phenix, 1997

2q5/8/3N2P1/3R1P2/3NP1K1/4kP2/4P2R/1n2B3

#2

11 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf5+
      • 2.S4xf5#
      • 2.S6xf5#
    • 1...Qa6
      • 2.Sc2#
    • 1...Qe6
      • 2.Sc2#
      • 2.Sc4#
    • 1...Qb7
      • 2.Sc2#
      • 2.Sc4#
    • 1...Qd7
      • 2.Sc2#
      • 2.Sc4#
    • 1...Qc2
      • 2.Sxc2#
    • 1...Qc4
      • 2.Sxc4#
    • 1...Qa8
      • 2.Sc2#
      • 2.Sc4#
    • 1...Qb8
      • 2.Sc2#
      • 2.Sc4#
    • 1...Qd8
      • 2.Sc2#
      • 2.Sc4#
    • 1...Qe8
      • 2.Sc2#
      • 2.Sc4#
    • 1...Qf8
      • 2.Sc2#
      • 2.Sc4#
    • 1...Qg8
      • 2.Sc2#
      • 2.Sc4#
    • 1...Qh8
      • 2.Sc2#
      • 2.Sc4#
    • 1...Sd2
      • 2.Bf2#
    • 1...Sc3
      • 2.Sc2#
  • Tries
    • 1.Sc6?
      • threat
        • 2.Sc4#
        • 2.Rd3#
      • 1...Qxf5+
        • 2.Sxf5#
      • 1...Qxc6
        • 2.Rd3#
      • 1...Sd2
        • 2.Bxd2#
        • 2.Rd3#
      • 1...Sa3
        • 2.Bd2#
        • 2.Rd3#
      • 1...Qa6!
    • 1.Bg3?
      • threat
        • 2.Bf4#
      • 1...Qxf5+
        • 2.S4xf5#
      • 1...Kd2!
    • 1.Bh4?
      • threat
        • 2.Bg5#
      • 1...Qxf5+
        • 2.S4xf5#
      • 1...Qd8
        • 2.Sc2#
        • 2.Sc4#
      • 1...Kd2!
    • 1.Rh3?
      • threat
        • 2.f4#
      • 1...Qxf5+
        • 2.S6xf5#
      • 1...Qh8
        • 2.Sc4#
      • 1...Sd2!
  • Keys
    • 1.f4!
      • threat
        • 2.Rh3#
      • 1...Qxf5+
        • 2.S4xf5#
      • 1...Qh8
        • 2.Sc2#
      • 1...Sd2
        • 2.Bf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • Q(c);N_GUARD,N_PINP(I)::S(E)
    • Q(c);N_GUARD,N_PINP(I)::S(E),XQ(c)
    • Q(c);N_GUARD,N_PINP(I)::S(J),XQ(c)
    • S(a);SBLOCK::B(A)
    • S(a);S_CUTQ(c)::S(E)
  • Tries
    • Try
      • S(E);
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);CHECK,XP(I)::S(J),XQ(c)
        • Q(c);N_PINP(I),XS(E)::R1(H)
      • Refutation
        • Q(c);N_PINP(I)
    • Try
      • B(A);
      • Threat
        • B(A)
      • Vars
        • Q(c);CHECK,XP(I)::S(E),XQ(c)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(A);
      • Threat
        • B(A)
      • Vars
        • Q(c);CHECK,XP(I)::S(E),XQ(c)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(C);
      • Threat
        • R(C)+P(D)
      • Vars
        • Q(c);CHECK,XP(I)::S(J),XQ(c)
        • Q(c);N_GUARD,N_PINP(I)::S(J)
      • Refutation
        • S(a);
  • Actual
    • P(D);
    • Threat
      • R(C)
    • Vars
      • Q(c);CHECK,XP(I)::S(E),XQ(c)
      • Q(c);N_GUARD,N_PINP(I)::S(E)
      • S(a);SBLOCK::B(A)
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